Container



Aug. 3, 1937. c, R lER 2,088,832

CONTAINER Original Filed May 25, 1932 Patented Aug. 3, 1937 UNITED STATES PATENT ()FFICE 2.088.832 CONTAINER Cesare Barbieri, New

Dixie-Vortex ware Original application 613,373. Divided May 25, 1932, and this application Novem- York, N. Y., assignmto Company, a corporation of Dela- Serial No.

ber 26, 1934, Serial No. 754,715

8 Claims.

This invention relates to improvements in containers, and more particularly to a container invention will have purposes as will be apparent to one skilled in the art.

Difliculty has been experienced in providing containers, such as drinking cups, from paper and similar sheet material of a desired strength Without using material of a character that is prohibitively expensive. 1 Frequently, containers 15 made out of relatively light material begin to sag true in connection known of the so-called other words, containers and the-containers as a strong.

With the foregoing in mind, it is an object of the present invention to provide a container of the general character of a paper drinking cup parts to the construction.

Another object of this invention is the provision of a container of flexible sheet material having a stronger body portion than containers heretofore constructed of the same material.

It is also an object of this invention to provide the container.

Still another object of this invention is the 55 provision of a container of the general type of a paper drinking cup having a rolled rim bead the rim co-pending application" for Letters Patent entitled Cup machine, filed May 25, 1932 Serial No. 613,373. This invention might also be manufactured by a method or process such as set forth and claimed in my other co-pending application entitled Process of making containers, filed April 26, 1934, Serial No. 722,442.

This application is a division of my aforesaid co-pending application Serial No. 613,373.

In the illustrated embodiment of the present 7 invention, there is seen a container 5 this instance, called flat bottom drinking cup, a drinking cup that'is capable of standing by itself with or without contents. It, of course, will be understood which, in

is shown in the form of a so-' heretofore made of the same material but embodying a different construction.

The container 5 includes a body portion 5 which is initially formed from a substantially 5 flat blank of material. The blank is first folded or rolled into container form in a shape substantially that of an open-ended cylinder, with tapering side walls. This cylinder has a side seam I formed of overlapped marginal portions 8 and 8 (Figure 3) secured together in any desired manner, such as by a suitable adhesive.

One of the major features of the present invention resides in the construction of the body portion. As explained more fully in my aforesaid co-pending application Serial No. 722,442, the stock of the body portion is held under stretching or circumferential tension during the formation of substantially the entire cup, and at least until after the adhesive uniting the overlapped margins 8 and 9 has had ample opportunity to set. After the setting of the adhesive, the stock of the blank cannot relax and assume its original degree of no tension because the adhesive maintains the stock of the body portion of the container under tension substantially permanently or until the container is destroyed. By holding the stock of the body portion of the container under tension, the resultant container is rendered very much stronger and more durable than if the stock was used in its ordinary state of relaxation or unstretched.

As seen best in Figure 3, a bottom member I0 is provided for the container 5, and this bottom member is provided with a depending annular flange ll thereon. The lower or smaller end of the body portion 8 is folded inwardly, as at if, to embrace the flange II. This fold in the structure is preferably ironed and adhesive may be used between the portion I! of the body and the flange ii of the bottom. The bottom is placed in the container while the stock of the body portion is maintained under tension, and after the bottom has been ironed into position this bottom or base construction also aids in preventing the stock of the body portion from assuming its normal degree of relaxation.

At the upper end of the container, the margin of the body portion 8, this being the long lateral margin of the initial blank, is rolled downwardly to form a rim bead i3. This rim bead, as more fully explained in my aforesaid co-pending applications, is spun upon the cup while the cup or container itself is relatively stationary and while the bead forming mechanism is also rotated at a relatively high speed. The forming of the rim bead results in a peripheral or circumferential spiraling of the stock in the bead. This spiraling is indicated in Figure 4, wherein the lines ll, which are not visible to the naked eye in the finished container, indicate elements in the container to illustrate how the stock fibres are spiraled upon the formation of the bead.

It will also be noted with reference to Figure 1 that one of the overlapped margins, in this instance the inner margin 9 of the seam l is cut or gin will not be completely turned under with the other marginal portion when the bead is formed, thereby giving the bead the appearance of uniform thickness in the finished container.

The bead u is preferably formed while the body portion I of the container is positively maintained under tension, and while the adhesive securing the overlapped margins 8 and 9 of the body portion may be suilicient to maintain the 75 stock of the body portion permanently under aoaassa tension, the bottom construction and the bead construction both aid in maintaining this tension, at least by preventing a relaxation of the stock of the body portion adjacent the ends of the body portion.

Ijrom the foregoing, it will be apparent that I have provided a container which is stronger, more durable and capable of withstanding a greater pressure than other containers embodying difierent construction and made of the same material. It is obvious that the particular construction utilized in the present invention necessitates no increase in the amount of material, nor does it necessitate the use of more expensive material, but the construction is such as to provide more inherent durability in the container. The peculiar construction of the bead i3 eliminates to a great extent the objectionable radial or lateral cracking of the bead due to pressure upon the sides of the container by the hands of a. user. The bottom construction is rigid. The body construction is such that, being under tension constantly, it is more capable of withstanding both vertical and lateral pressure. The container as a whole will hold a liquid substance satisfactorily over a great length of time. In addition, it will be noted that the container may be extremely economically manufactured and a plurality of containers may readily be placed in stacked relationship.

I am aware that many changes may be made and numerous details of construction may be varied through a wide range without departing from the principles of this invention, and I, therefore, do not purpose limiting the patent granted hereon otherwise than is necessitated by the prior art.

I claim as my invention:

1. As an article of manufacture, a paper container comprising a body portion formed from an initially substantially flat blank and having meeting portions thereof adhesively secured together, the upper margin of said blank being turned down to form a rim head the stock of which is spiraled and offset circumferentially relatively to the stock of the container body.

2. As an article of manufacture, a paper container comprising a body portion formed from an initially substantially flat blank, said container having an open end, a peripherally spirally curved rim head around said open end, a bottom portion securely engaged with the other end of said body portion, the stock of said body portion being held under a stretching tension in excess of the inherent tension resulting from the shaping of the blank to strengthen the container.

3. As an article of manufacture, a container formed of flexible sheet material and having an open end, the material of the body portion adjacent said end being curled downwardly to form a rim bead with the stock thereof spiraled peripherally relatively to the remainder of the stock of the body portion, and the body portion of said container being held under a stretching tension to enhance the stiffness of said container.

4. As an article of manufacture, a cup made from a paper blank having an arcuate outer edge for defining the mouth of the cup and side edges adapted to be overlapped and glued together, the blank defining the wall of the cup being under circumferential tension by reason of its being compressed and stretched circumferentially prior to the gluing of its edges to rigidify the wall, and a bottom member secured to said wall, the rim of said cup at its open end comprising a peripherally spiraled bead formed on said arouate edge for also enhancing the rigidity of the cup.

5. As an article of manufacture, a paper container having a body part formed of an initially flat blank stretched under a positive tension while being formed into container shape, said body part also having overlapped marginal portions secured together to maintain said tension.

6. As an article of manufacture, a paper container having a body part formed of an initially flat blank subjected to a stretching tension prior to being formed into container shape, said body part also having overlapped marginal portions secured togetherto maintain said tension, and a rim bead formed adjacent an end of said body part, the stock of said bead being splraled peripherally relatively to the stock of the body Part.

7. As an article of manufacture, a container having a body portion of flexible sheet material subjected toa stretching tension in excess of that resulting from the mere shaping of a blank into container form, a peripherally spiraled rim bead on one end of said body portion, and a bottom member secured to said body portion at the other end thereof, said head and the securement of said bottom member maintaining said tension in said body portion.

8. As an article of manufacture, a flat bottom cup including a body part made of flexible sheet material, said body part being stretched under a positive tension during'its formation into cup shape, said body part having overlapped marginal portions secured together to maintain said tension, and a bottom member engaged with the body part to complete the cup.

CESARE BARBIERI. 

